Lyman
"Mutiny was alive".....
My instinct - if PNF had decisively taken command, PF would have willingly acquiesced and happily run the UAS drill.
Put yourselves in the shoes of the PF - he was being "nagged" at by a PNF fretting over the CDB's ongoing absence. Inspiring, when PF is PIC under AF's "interesting" chain of command procedures at that time?
So, if not an interconnected SS, what was needed re: inducing PNF (in the context of experience/training/the cricket stall alarm being ignored) re: what the PF was commanding through his SS and its effect on altitude, pitch, AoA, thrust and trim.....?